| 摘要 |
Polyolefin thermoplastic elastomers are disclosed which are prepared by;(I) mixing(A) a thermoplastic resin comprising more than 50 percent by volume of a polyolefin resin, said thermoplastic resin having a softening point of 23° C. to 300° C.;(B) a silicone base comprising(B') 100 parts by weight of a diorganopolysiloxane gum having a plasticity of at least 30 and having an average of at least 2 alkenyl groups per molecule, and optionally,(B'') up to 200 parts by weight of a reinforcing filler,the weight ratio of said silicone base to said polyolefin thermoplastic resin is from 35:65 to 85:15;(C) a radical initiator, present in an amount sufficient to cure said diorganopolysiloxane gum (B'); and(II) dynamically vulcanizing said diorganopolysiloxane gum,wherein at least one property of the thermoplastic elastomer selected from tensile strength or elongation is at least 25% greater than the respective property for a corresponding simple blend wherein said diorganopolysiloxane gum is not cured and said thermoplastic elastomer has an elongation of at least 25%.
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